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Property Reassessment & Appeal Overview


Every three years the Cook County Assessor reassesses property in Cook County. The reassessments occur geographically by Township. The City of Chicago was reassessed in 2018, the Townships of New Trier, Niles and Northfield, and the City of Evanston will be reassessed in 2019, and West and South Suburban communities are being reassessed in 2020.

Click here for appeal filing & closing deadlines.

Once a property owner receives the “Notice of Proposed Assessed Valuation” in the mail, they may appeal their reassessment. There are three stages to the appeal process. First, a property owner may appeal with the Cook County Assessor’s Office. If a property owner is not satisfied with the findings of the Assessor’s office, he or she may appeal to the Cook County Board of Review. If a property owner is also dissatisfied with the findings of the Board of Review, he or she may file a final appeal with the Illinois Property Tax Appeal Board, commonly know as PTAB.

Detailed information on each of these appeal processes follows.

The Civic Federation issued an analysis of the Property Assessment Appeals process, which you can download here.

Once the Proposed Assessed Valuation notices are mailed, I hold property tax seminars in the 13th District townships being assessed. The seminars will provide general information on the assessment process, avenues for assessment appeals, resources available, and tax exemptions. I will update this information as we schedule seminars.

If you have additional questions, I encourage you to attend one of my property tax seminars or call my office at 847-864-1209 to schedule an appointment.

** Please note that this information is provided for informational purposes only; my office cannot provide legal services to you or represent your interests to the Assessor’s office or the Cook County Board of Review.

 Cook County Board of Review

After the Cook County Assessor closes its appeal process, the Cook County Board of Review opens to hears appeals from each township within Cook County. Township appeals are heard one township at a time.

Residents, whether they have filed an appeal in the past or have questions regarding their assessment, are encouraged to file an appeal with the Board of Review if they feel their assessment is wrong.

For more information, visit or contact Commissioner Suffredin's district office at 847-864-1209.

Illinois Property Tax Appeal Board

Property owners who have appealed their tax assessment with the Cook County Board of Review and have received a finding from the Board that they are dissatisfied with can appeal to the Illinois Property Tax Appeal Board, commonly known as PTAB.

A petition for appeal to the PTAB must be filed within 30 days of the postmark date of the written notice of the Board of Review’s decision. PTAB is a State agency and residents who wish to appeal the Board of Review’s decision are encouraged to contact PTAB directly at:

Illinois Property Tax Appeal Board

402 Stratton Office Building

401 South Spring

Springfield, IL 62706

Phone: (217) 782-6076

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